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  1. #1
    diamondwatercraft's Avatar
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    97 GTX hesitation

    I have a stock 97 GTX that I cannot find why it is hesitating at midrange. I have looked into the normal culprits like the rave valves and the needle and seats. The carburetion looks fine and I just went through the rave valves with new gaskets and seals. I have great compression, fresh fuel, and new spark plugs.

    Any idea on what I should look for next?

  2. #2
    There was a tsb on rave valves with hesitation at approx 4500 Rpms. Solution was slotted raves. It seemed to only affect the 97's.


  3. #3
    wkuadam07's Avatar
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    It was the rave housings, the rave valves themselves are ok. Replace the housings with SBT housings and it will be good to go.


  4. #4
    diamondwatercraft's Avatar
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    WOW the amount of knowledge about this that you guys have is impressive. I will get those rave valve housings changed out. Can I use 96 housings?

  5. #5
    wkuadam07's Avatar
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    96 Housings are good, but i don't even chance used ones anymore. 20+ years of use has left a lot of the used rave housings pretty much worn out.
    SBT lists the same one for most applications here http://www.shopsbt.com/jetski/sea-do...362-95-03.html
    I have used these every time i had a worn out set, or a 97 with the hesitation and they haven't let me down yet.

  6. #6
    diamondwatercraft's Avatar
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    Just placed my order on those new housings thanks!

  7. #7
    diamondwatercraft's Avatar
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    Update, so far so good on the housings. I am very confused on how this would cause this issue? The housing has some sort of function besides sealing?

  8. #8

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    good to know about the 97's


  9. #9
    wkuadam07's Avatar
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    Quote Originally Posted by diamondwatercraft View Post
    Update, so far so good on the housings. I am very confused on how this would cause this issue? The housing has some sort of function besides sealing?
    There is a crankcase pressure passage in them that feeds pressure to the inside of the bellows and makes the raves open and close. The bad ones from 97 were machined or cast incorrectly and that passage doesn't allow the rave valve to open at the right RPM range.


  10. #10
    diamondwatercraft's Avatar
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    Quote Originally Posted by wkuadam07 View Post
    There is a crankcase pressure passage in them that feeds pressure to the inside of the bellows and makes the raves open and close. The bad ones from 97 were machined or cast incorrectly and that passage doesn't allow the rave valve to open at the right RPM range.
    Thanks for that explanation 07! It has been running great ever since the replacement.

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